How to measure 8TZ CR Airtight Zipper & WatertightZipper?

How to measure 8TZ CR Airtight Zipper & Watertight Zippers?

We can supply two types (open end and close end) 8TZ CR Airtight Zipper & Waterproof Zippers

 in diiferent length from 20CM to 5000CM.

Pls check the following parameter photo to know how to measure the 8TZ CR Airtight Zipper & Waterproof Zippers

We need to know what effective length for your application.